/Engine/Plugins/Online/OnlineSubsystem/Source/Public/Interfaces/OnlineGroupsInterface.h
A structure for caching a list of people who have requested to join the group
typedef [IGroupUserCollection](API\Plugins\OnlineSubsystem\Interfaces\IGroupUserCollection)< [FGroupMemberRequest](API\Plugins\OnlineSubsystem\Interfaces\FGroupMemberRequest) > IGroupRequests